import matplotlib.pyplot as plt

x_values = list(range(1, 1001))
y_values = [x ** 2 for x in x_values]
plt.scatter(x_values, y_values, c=y_values, cmap=plt.cm.Blues,
            edgecolors='none',  s=40)

# 设置图表标题，给坐标轴加标签
plt.title("Square Numbbers", fontsize=24)
plt.xlabel("Value", fontsize=14)
plt.ylabel("Squar of value", fontsize=14)

# 设置刻度标记的大小
plt.tick_params(axis='both', which="major", labelsize=14)

# 设置每个坐标轴的取值范围
plt.axis([0, 1100, 0, 1100000])

plt.savefig('15.2.9_squares_plot.png', bbox_inches='tight')
plt.show()
